93 lines
2.3 KiB
JavaScript
93 lines
2.3 KiB
JavaScript
function Timer(options) {
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options = options || {}
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this.onTick = options.onTick || function () {}
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this.onComplete = options.onComplete || function () {}
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this._duration = 0
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this._remaining = 0
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this._elapsed = 0
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this._startTime = 0
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this._pausedTime = 0
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this._intervalId = null
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this._running = false
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this._paused = false
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this._completed = false
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}
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Timer.prototype.start = function (duration) {
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this._duration = duration
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this._remaining = duration
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this._elapsed = 0
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this._completed = false
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this._running = true
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this._paused = false
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this._startTime = Date.now()
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this._tick()
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var self = this
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this._intervalId = setInterval(function () { self._tick() }, 1000)
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}
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Timer.prototype.pause = function () {
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if (!this._running || this._paused) return
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this._paused = true
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this._pausedTime = Date.now()
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clearInterval(this._intervalId)
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this._intervalId = null
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}
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Timer.prototype.resume = function () {
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if (!this._running || !this._paused) return
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this._startTime += Date.now() - this._pausedTime
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this._paused = false
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this._tick()
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var self = this
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this._intervalId = setInterval(function () { self._tick() }, 1000)
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}
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Timer.prototype.stop = function () {
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this._running = false
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this._paused = false
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clearInterval(this._intervalId)
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this._intervalId = null
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return this._elapsed
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}
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Timer.prototype._tick = function () {
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if (!this._running || this._paused) return
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this._elapsed = Math.floor((Date.now() - this._startTime) / 1000)
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this._remaining = Math.max(0, this._duration - this._elapsed)
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this.onTick({
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remaining: this._remaining,
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elapsed: this._elapsed,
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duration: this._duration
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})
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if (this._remaining <= 0 && !this._completed) {
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this._completed = true
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this.onComplete({ elapsed: this._elapsed, duration: this._duration })
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}
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}
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Object.defineProperty(Timer.prototype, 'isRunning', {
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get: function () { return this._running && !this._paused }
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})
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Object.defineProperty(Timer.prototype, 'isPaused', {
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get: function () { return this._paused }
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})
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Object.defineProperty(Timer.prototype, 'isCompleted', {
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get: function () { return this._completed }
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})
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Object.defineProperty(Timer.prototype, 'remaining', {
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get: function () { return this._remaining }
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})
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Object.defineProperty(Timer.prototype, 'elapsed', {
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get: function () { return this._elapsed }
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})
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module.exports = Timer
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